Android 自定义漂亮的圆形进度条

这几天对Android中实现画圆弧及圆弧效果中所实现的效果进行了修改，改为进度圆心进度条，效果如图所示




 

TasksCompletedView.java 代码如下

 import android.content.Context;
 import android.content.res.TypedArray;
 import android.graphics.Canvas;
 import android.graphics.Paint;
 import android.graphics.RectF;
 import android.graphics.Paint.FontMetrics;
 import android.util.AttributeSet;
 import android.view.View;

 import com.snailws.taskscompleted.R;

 /**
 * @author naiyu(http://snailws.com)
 * @version 1.0
 */
 public class TasksCompletedView extends View {

         // 画实心圆的画笔
         private Paint mCirclePaint;
         // 画圆环的画笔
         private Paint mRingPaint;
         // 画字体的画笔
         private Paint mTextPaint;
         // 圆形颜色
         private int mCircleColor;
         // 圆环颜色
         private int mRingColor;
         // 半径
         private float mRadius;
         // 圆环半径
         private float mRingRadius;
         // 圆环宽度
         private float mStrokeWidth;
         // 圆心x坐标
         private int mXCenter;
         // 圆心y坐标
         private int mYCenter;
         // 字的长度
         private float mTxtWidth;
         // 字的高度
         private float mTxtHeight;
         // 总进度
         private int mTotalProgress = 100;
         // 当前进度
         private int mProgress;

         public TasksCompletedView(Context context, AttributeSet attrs) {
                 super(context, attrs);
                 // 获取自定义的属性
                 initAttrs(context, attrs);
                 initVariable();
         }

         private void initAttrs(Context context, AttributeSet attrs) {
                 TypedArray typeArray = context.getTheme().obtainStyledAttributes(attrs,
                                 R.styleable.TasksCompletedView, 0, 0);
                 mRadius = typeArray.getDimension(R.styleable.TasksCompletedView_radius, 80);
                 mStrokeWidth = typeArray.getDimension(R.styleable.TasksCompletedView_strokeWidth, 10);
                 mCircleColor = typeArray.getColor(R.styleable.TasksCompletedView_circleColor, 0xFFFFFFFF);
                 mRingColor = typeArray.getColor(R.styleable.TasksCompletedView_ringColor, 0xFFFFFFFF);

                 mRingRadius = mRadius + mStrokeWidth / 2;
         }

         private void initVariable() {
                 mCirclePaint = new Paint();
                 mCirclePaint.setAntiAlias(true);
                 mCirclePaint.setColor(mCircleColor);
                 mCirclePaint.setStyle(Paint.Style.FILL);

                 mRingPaint = new Paint();
                 mRingPaint.setAntiAlias(true);
                 mRingPaint.setColor(mRingColor);
                 mRingPaint.setStyle(Paint.Style.STROKE);
                 mRingPaint.setStrokeWidth(mStrokeWidth);

                 mTextPaint = new Paint();
                 mTextPaint.setAntiAlias(true);
                 mTextPaint.setStyle(Paint.Style.FILL);
                 mTextPaint.setARGB(255, 255, 255, 255);
                 mTextPaint.setTextSize(mRadius / 2);

                 FontMetrics fm = mTextPaint.getFontMetrics();
                 mTxtHeight = (int) Math.ceil(fm.descent - fm.ascent);

         }

         @Override
         protected void onDraw(Canvas canvas) {

                 mXCenter = getWidth() / 2;
                 mYCenter = getHeight() / 2;

                 canvas.drawCircle(mXCenter, mYCenter, mRadius, mCirclePaint);

                 if (mProgress > 0 ) {
                         RectF oval = new RectF();
                         oval.left = (mXCenter - mRingRadius);
                         oval.top = (mYCenter - mRingRadius);
                         oval.right = mRingRadius * 2 + (mXCenter - mRingRadius);
                         oval.bottom = mRingRadius * 2 + (mYCenter - mRingRadius);
                         canvas.drawArc(oval, -90, ((float)mProgress / mTotalProgress) * 360, false, mRingPaint); //
 //                        canvas.drawCircle(mXCenter, mYCenter, mRadius + mStrokeWidth / 2, mRingPaint);
                         String txt = mProgress + "%";
                         mTxtWidth = mTextPaint.measureText(txt, 0, txt.length());
                         canvas.drawText(txt, mXCenter - mTxtWidth / 2, mYCenter + mTxtHeight / 4, mTextPaint);
                 }
         }

         public void setProgress(int progress) {
                 mProgress = progress;
 //                invalidate();
                 postInvalidate();
         }

 }

attrs.xml

 <?xml version="1.0" encoding="utf-8"?>
 <resources>

     <declare-styleable name="TasksCompletedView">
         <attr name="radius" format="dimension"/>
         <attr name="strokeWidth" format="dimension"/>
         <attr name="circleColor" format="color"/>
         <attr name="ringColor" format="color"/>
     </declare-styleable>

 </resources>

源码下载：http://download.csdn.net/detail/nainai007/6554501